Stator winding machine



Nov. 6, 1951 H. P. LINDERS 2,573,976

STATOR WINDING MACHINE Filed Jan. 12, 1946 3 Sheets-Shet l 28 '59 38INVENTORI 7+- A YPLINDERS BY AT ORNEY Nov. 6, 1951 H. P. LINDERS2,573,976

STATOR WINDING MACHINE Filed Jan. 12, 1946 3 Sheets-Sheet 2 ATTORNEYNov. 6, 1951 H. P. LINDERS STATOR WINDING MACHINE 3 Sheets-Sheet 3 FiledJan. 12, 19:46

S R E D V DI Patented Nov. 6, 1951 STATOR WINDING MACHINE Harry P.Linders, Pine Lawn, Mo., assignor to Wagner Electric Corporation, St.Louis, Mo., a corporation of Delaware Application January 12, 1946,Serial No. 640,967

2 Claims. (01. 242 -1 Thisinvention relates to stator winding machinesand in its more specific aspects is directed to a method and mechanismfor threading a conductor into suitably shaped slots in a stator corefor electrical machinery.

One of the objects of this invention is to provide a coil windingmachine for the stator core or pole piece in electro-dynamo machinery inwhich the conductor is threaded into the desired slots in the core andin which the segment of the conductor forming the ends of the coilispreformed before the conductor is threaded through the stator slot.

Another object of the invention is to provide a machine capable ofpreforming portions of windings and placing them in stator cores, whichmachine is equipped with an index mechanism to properly positiona'stator core to enable the conductor threading mechanism to place aconductor in any one of a plurality of core slots.

Still another object of the invention is to provide a coil windingmachine fora stator core having a plurality of coils per pole piece andin l which coil preforming devices are associated with the machine forpartially preforming the ends of the coil before the shuttle orconductor threading device is reciprocated with respect to thestatorcore.

Various expedients in the art of coil winding have been employed in thepast to wind the cores of stators for electro-dynamo machinery, some ofwhich have involved the preliminary manufacture of the coil and itsassembly prior to insertion into the stator. Other devices have beenproduced which manually-wind the stator when assembled into the machineframe. This invention discloses a method and machine for the winding ofa stator core having pole pieces therein which are wound with aplurality of serially connected coils and in which a portion of theindividual turn of each coil is partially preliminarily shaped beforebeing inserted in a stator slot as the conductor is withdrawn from areel.

, I In the drawings Figure l is a plan view of a stator winding machine;

Figure 2 shows the elevation of one end thereof;

Figure 3 shows the elevation of the other end thereof 1 Figure 4discloses a side elevation thereof with parts in section, taken alongthe line 4-4 of Figure 1;

Figure 5 shows the position of parts at the start of the windingoperation;

Figure 7 is a view taken along the line 'Il of Figure 6 shown in thefirst index position;

Figure 8 shows the second index position of the index head;

Figure 9 is a sectional View of the conductor shuttle or threadingdevice; and

Figure 10 is an elevational view of the stator core to be wound on thewinding machine.

The above objects and advantages are obtained in. the structure setforth in the accompanying drawings in which numeral I designates anappropriate base on which is mounted a stator supporting elementpreferably in the form of spaced apart members 2, 2. These members aresecured near one end of base I by suitable screws or other appropriateexpedients. A second sup- .port 3 is secured to plate I and is disposeda short distance away from supports 2, 2. A tapered or cone-shapedsleeve 5 is arranged on sleeve 4 (Figure 4), immediately adjacentsupport 3, for the purpose of circumferentially forming one end portionof a coil. A preforming die 51 is secured to sleeve 5 (Figure 1) for thepurpose of partially preforming the section of the conductor which willform the end portion of the coil. The sleeve 4 extends through aperturesin supports 2, 2 and a second tapered or cone-shaped sleeve 6 for thepurpose of forming the other end portion of the coil is removablysecured to the outer end of sleeve 4. A preforming die 56 (Figures 1 and5) is secured to sleeveB whose function is identical with that of die51. Sleeve 4 has suitable apertures 60, arranged therein through which asuitable thimble may be moved radially relatively to sleeve 4, and aslit 59 connects the two apertures through which the conductor isthreaded as the shuttle moves back and forth in order to place it in thedesired coil slots.

Extending rearwardly from support 3 on base I is a pair of spaced ways 9and Ill (Figure 3) to which retaining elements II and I2 are secured andsaid ways and elements are secured to base I by suitable holding meanssuch as screws I3 and I4. Arranged between ways 9 and I0 is a carriageor slide I5 guided therein for reciprocable movement longitudinally ofbase I toward and away from the sleeve support 3. Slide I5 is movablebetween ways 9 and I0 by means of a lever I6 pivoted on pin I8 to asupport I1. Support I! is rigidly secured to a member I9 which issecured to slide I5.

Arranged on one side of the machine, which may be designated as theoperator's side, is a template 20 secured to way In by a plurality ofscrews 2 I. The template has a slot 22 (Figure 4) threaded into member28.

therein, extending in the same direction as the slots in the statorcore, in which the handle l6 slides, and slots 23 and 24, arranged atrightangles to slot 22, connect with the horizontal slot 22 to enablethe handle or lever 16 to move therein about pin [8 as an axis. Thelength of slot 22 is equal to the length of stator 1 plus the extent ofmovement of die 36 (Figures 4, 5, and 6) past the ends of stator I. Thereasons for these handle movements will be subsequently set forth.

A pair of uprights 25 and 26 is secured to slide preferably on oppositesides of member 19;

Slidably mounted on uprights 25 and 2 6 is a shut; tle or threadingdevice which comprises a suitable casting or support 2'! to which alongitudinally extended member 28 is secured by means of one or morescrews 29 threaded into a suitable bracket integral with support 21. Thesupport 2.T is moved vertically on uprights 25 and 26 by"'ha'ndle l 8which is suitably connected to support 2'! by a pin 34 (Figure 4).Member 28 is moved longitudinally with respect to sleeve 4 and ways 9and by handle l6. The member 28 constitutes a shuttle or conductorthreading device to guide awire into position in the slots of a statorcore.

Arranged in the apertures in supports 2, 2 is a cylindrical sleevemember 32 having a collar 33 thereon which is arranged between supports2, 2. The collar 33 prevents axial motion of sleeve 32 relatively tosupports 2, 2 but sleeve 32 is permitted to move rotatably with respectto supports 2, 2. A conductor anchor 35 is secured to sleeve 32 in theposition illustrated. The stator I is assembled in sleeve 32 aboutsleeve 4 and lies adjacent the taperedsleeve 5 and after the stator isin position, the tapered sleeve '6 is secured on sleeve 4 to lieadjacent stator'l. A suitable locking screw 8 is provided to lock sleeve6 on sleeve 4. The diameter of the aperture in stator l isslightly-larger than the outer diameter of sleeve 4 to allow a free andeasy relative motion of the sleeve and stator.

The shuttle or threading device 28'has arranged at one end a member 36through which conductor 40 passes, which is made up in the form of adrawing die, to prevent injury to the conductor and its insulation. Thisthimble is removably secured to a comparatively thickwalled section oftubing 31 (Figures 5, 8, and 9) The member 28 has a slot 38 on one sidethereof in which a conductor guide in the form of a sheave 39 isrotatably supported. A similar sheave 39 is arranged at the opposite endof the shuttle device and said opposite end is slotted, through whichslot a conductor 40 is passed'which is then led about sheaves 39, 39(Figure 5) through the thimble 3 6 and is then secured to anchor 35.Conductor 48 is drawn from a spool of wire supported on a reel (notshown).

A lever or handle 4| is secured to a fixture 42 which is fastened to thesleeve and collar members 32 and 33 by means of which said members arerotated in the apertures in supports 2, 2. One of the supports 2 issomewhat enlarged and there is provided in the enlarged support aplurality of apertures 43, 43', and 43 on the one side and 44', 44, and44 on the other in which pins or stops 45 and 46 may be selectivelypositioned, depending upon which pair of slots in stator core I ishaving a coil wound therein. When apertures 43 and 44 have pins 45 and46 inserted therein, the first coil is wound and when it is completed,they are then moved to the adjacent apertures 43 and 44 for the windingof the second coil and when they are moved to the third apertures 43"and 44" following the winding of the second coil, the third coil iswound. There are as many such apertures as there are coils per polepiece in the stator.

The stator shown in Figure '7 is made up of a laminated constructionprovided with a plurality of slots per pole piece, part 41 beingregarded as the central member thereof on each side of which slots 48and 49 are formed and slots 58, 5|, 52,

and 53 are arranged adjacent thereto, as illustratedin Figure 10. Thesides of slots 48 and 49 are parallel to eachother and also to the sidesof slots 5|, 53and 50, 52. Each tooth 58 and each pole piece'41 hasportions 54 formed on the ends thereof extending toward each other sothat narrow slot openingsj55 are provided which communicate with theinterior of the respective slots, slot opening 55 being radial to thestator core and alignable with the conductor threading device. Thestator slots are shaped as illustrated in order to place the maximumnumber of coil turns therein. Suitable insulation (not shown) is placedin each of the several stator slots after which the stator may be wound.

" The operation of the winding machine begins by placing fixture 42inthe' position shownin Figure 7 and then threading conductor '40through the shuttle device 28 and thimble 36 and securing it to anchor35. The slide 15 is assumed to be in the position shown in Figure 1 andin its radially outward position, that is, lever I6 is in the dottedline position of Figure 3. Thus die 36 extends through and beyondaperture 60 in sleeve 4 and lifts conductor 40 above preforming die 56.The center line of thimble 36 is now aligned with the radial opening55in slot 49 (Figure 7). 'Handle [6 is now lowered to the full lineposition of Figure 3, retracting thimble 36 and placing it within sleeve4 and simultaneously causing die 56 to put a bend in conductor 46(Figure 5). Slide I5 and shuttle 28 are then moved toward the right fromthe full line position of thimble-'36 to the dotted line'position shownin Figure 5. This movement causes conductor 4U to'be drawn ofipreforming die 56, the bend therein facilitating its movement into theradial opening 55 and about the left end of the stator polepiece so thatthe conductor will assume the dotted line position of Figure 5. Shuttle28 is now moved radially outward to the full line position shown inFigure 6 (dotted line position in Figure 7) to move thimble 36 intoaperture 68 and to lift conductor 46 through slit 59 and radial opening55 into slot 49 and above preforming die 51 by'rotating handle l6 aboutpin I}! in slot 24. The stator I and its holder 32 are now rotatedclockwise until fixture 42 engages with pin 45 inserted in aperture 43.,This rota tive motion will align shuttle die 36 withradial opening 55of slot 48 (Figure 8). The shuttle device is now moved inward radiallyto the full line position of Figures 3 .and 8, which motion will causepreforming die ,5] to put a'bend in conductor 40.

Slide, l5 and shuttle 28 are now moved to the left to the position shownin Figures '1 and 4,

causing conductor 48 to be drawn ofi preforming die 51 and.simultaneously drawing the conductor about the right end of pole piece41 (Figure 6), the bend placed therein by die 5'! facilitating the entryof conductor 40 into slot 48 through its radial opening 55, shaping itabout the right end of pole piece 41' and placing the conductor in slot48 in a position comparable to that'shown in Figure 5. As it is drawnabout the right-hand end of pole piece 41, conductor 40 issimultaneously shaped circumferentially by tapered sleeve 5 which alsosupports the coil end during the winding operation. The shuttle is nowmoved radially outwardly through aperture 6|] by moving handle I6 aboutpin l8 in slot 23, lifting conductor 46 above preforming die 56 andthrough slit 59 into slot 48 through its radial opening 55, theconductor assuming a position in slot 48 comparable to that shown inFigure 6. Stator 1 and its holder 32 are now rotated counter-clockwiseuntil fixture 42 engages stop 46 and aligns shuttle thimble 36 withradial opening 55 of slot 49. Shuttle 28 is now moved radially inwardlyand slide l5 and shuttle 28 are again moved toward the right and asconductor 40 is drawn ofi preforming die 56 into slot 49, it will againassume the dotted line position shown in Figure 5 at the end of theright-hand movement. Conductor 40 will be drawn about the left-hand endof pole piece 41 during such movement and the bend placed therein bypreforming die 56, facilitates this action and tapered sleeve 6 willsimultaneously circumferentially shape the end portion of the coil andalso support the coil end during winding operations. Shuttle 28 and die36 are now moved radially outwardly and the fixture 42 is placed in theposition shown in Figure 8.

When a sufiicient number of turns have been assembled in slots 48 and 49in the manner described, the extent of rotational movement of the statoris then increased by positioning the pins 45 and 46 in aperture 43 and44' so that slots 58 and 5| may be wound with a sufiicient number ofturns whereupon pins 45 and 46 are placed in apertures 43" and 44" sothat slots 52 and 53 may be wound with a sufiicient number of turns.

While the device is illustrated for the winding of one pole, it isunderstood that there may be as many shuttle devices 28 as there arepoles in the stator core, thereby enabling the entire stator to be woundin a single operation of the machine. The manual operation set forth inthe instant disclosure has been selected for reasons of simplicity inorder to better portray the method and means by which the stator iswound and the coil ends preformed and shaped as winding progresses.

Having fully described my invention, that which I claim as novel anddesire to protect by Letters Patent of the United States is:

1. A machine for laying the sides or a coil turn in an internallyslotted stator core and for forming the free end portions of the coilturn formed from a wire conductor comprising a stator support in whichthe stator core is mounted; a second supporting means; a sleeve on saidsecond means concentrically disposed in said stator holder; a thimbledisposed in said sleeve; a slide on which said thimble is movablymounted with respect to said stator support to move said thimble axiallywith respect to said sleeve; means to move said thimble radially withrespect to said sleeve; means supported on said sleeve to preform theportion of the conductor constituting the free end portion of the coilturn wound in the stator slots; and other means supported on said sleeveto substantially circumferentially shape and support the free endportions of the coil turn as it is wound in the stator slots.

2. A machine for laying the sides of a coil turn in an internallyslotted stator core and for forming the free end portions of the coilturn formed from a wire conductor comprising a stator support in whichthe stator core is mounted; means on said base to rotatably support astator holder; a slide reciprocably mounted with respect to said statorsupports; a mechanism having a thimble thereon disposed within saidmeans supported on said slide; means to radially move and to reciprocatesaid thimble relative to said stator holder; another support; a tubularelement on said support concentrically disposed within said statorholder and having apertures therein through which said thimble on saidshuttle may move in its radia1 movement; a pair of tapered sleeves onsaid tubular element to shape the free end portions of a coil turn woundin the stator core; and means on each of said tapered sleeves to preforma segment of conductor that is to form the free end portion of a coilturn, said means assisting in aligning the conductor with the next slotinto which the conductor is to be placed.

HARRY P. LINDERS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Jannell v- Dec. 28, 1926

